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authorThiemo Seufer <ths@networkno.de>2005-09-09 17:09:18 +0000
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 19:32:17 +0100
commit424cadae94a683afe2164f726269d2b479d99732 (patch)
treec75849ee46e6b6f7ab209c1fdae8d89fb4dd4d68 /arch/mips/mm
parent98e316d4b151111d5a8ff2b3a684a9300634d83f (diff)
downloadop-kernel-dev-424cadae94a683afe2164f726269d2b479d99732.zip
op-kernel-dev-424cadae94a683afe2164f726269d2b479d99732.tar.gz
Don't set up a sg dma address if we have no page address for some reason.
Code cleanup. Signed-off-by: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm')
-rw-r--r--arch/mips/mm/dma-noncoherent.c46
1 files changed, 8 insertions, 38 deletions
diff --git a/arch/mips/mm/dma-noncoherent.c b/arch/mips/mm/dma-noncoherent.c
index 4ce0202..cd4ea84 100644
--- a/arch/mips/mm/dma-noncoherent.c
+++ b/arch/mips/mm/dma-noncoherent.c
@@ -105,22 +105,7 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
{
unsigned long addr = (unsigned long) ptr;
- switch (direction) {
- case DMA_TO_DEVICE:
- dma_cache_wback(addr, size);
- break;
-
- case DMA_FROM_DEVICE:
- dma_cache_inv(addr, size);
- break;
-
- case DMA_BIDIRECTIONAL:
- dma_cache_wback_inv(addr, size);
- break;
-
- default:
- BUG();
- }
+ __dma_sync(addr, size, direction);
return virt_to_phys(ptr);
}
@@ -133,22 +118,7 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
unsigned long addr;
addr = dma_addr + PAGE_OFFSET;
- switch (direction) {
- case DMA_TO_DEVICE:
- //dma_cache_wback(addr, size);
- break;
-
- case DMA_FROM_DEVICE:
- //dma_cache_inv(addr, size);
- break;
-
- case DMA_BIDIRECTIONAL:
- //dma_cache_wback_inv(addr, size);
- break;
-
- default:
- BUG();
- }
+ //__dma_sync(addr, size, direction);
}
EXPORT_SYMBOL(dma_unmap_single);
@@ -164,10 +134,11 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
unsigned long addr;
addr = (unsigned long) page_address(sg->page);
- if (addr)
+ if (addr) {
__dma_sync(addr + sg->offset, sg->length, direction);
- sg->dma_address = (dma_addr_t)
- (page_to_phys(sg->page) + sg->offset);
+ sg->dma_address = (dma_addr_t)page_to_phys(sg->page)
+ + sg->offset;
+ }
}
return nents;
@@ -218,9 +189,8 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
for (i = 0; i < nhwentries; i++, sg++) {
addr = (unsigned long) page_address(sg->page);
- if (!addr)
- continue;
- dma_cache_wback_inv(addr + sg->offset, sg->length);
+ if (addr)
+ __dma_sync(addr + sg->offset, sg->length, direction);
}
}
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